Warp stop mechanism for looms



D. BROWN FOR LOOMS WARP STOP MECHANISM 1924 2 Shets-Sheet l Filed Nov. 10

ATTOR A/BZ WARP 5T0? MECHANISM FOR LOOMS Filed Nov. 10,

rmssimzosrzi ro, irsssitoirori To ERAPER oom'oim. ir sriorrosiar'ro; A. ooriroroi'rroii MAINE.

viz m? i iiroiqoirirsmf EFKBE ooms.

aln lm'j i'ovemoot in :Warp Stop iilochanisms for Looms, oi which the following: descriptlonm commotion. with him :roo wo ms on the drawings: roprosomimg like 'ihig; invention 2' 7 fio'ivzrro i r moohonism for iooms w. y iooro is Drought to root who-1r a War}; throzui brooks or oocomm: i'oo sizick for 18H mg" porposoo.

ivieohzmiso'zs of this hypo compriso n, soriose' of. drop wires "which are :oorn'miiy' 5L1p] ()1't;d by the Warp threads during WP/SLW ing and when one or more warp broods hocomo too 311101; for wearing purposes, the supported drop Wire niovos into is; path oi & detector, w .iohisi th-oroi m. ESiGii'ill i115: ting move-wont and th nigh tho'ooro norm mechanism oi'ieohs ioo 1 Si: ppago. Owing to tho low number oi? Warp throirris in ii sheet pas from 'iho Warp boom,

11 mi the inconspicuous oilzurnrzicr of. tho drop wirvs, muchrhiil'mity 18 experienced by ihe \HWHGIS in iocatmggtho warp fault, for the urpose of piooing up broken QilfiS or mnm'iying ii a undue .ckimss th row/f and mm of the objects of the prose-niiioontioio, ihi-i'ciloro, is to prmiiiio u warp stop moohamin wherein moans shrill bo provided for oi, onoo indicating tho iosition of tho Warp iziuit whorwvor tholooiii s brought to rest through the warp stop i'i'ioohaliism in that typo of war-pisto ii'iooiimlisnr when: a vibrating (iotooior is o i'ipio mh it has 'booii usual heretofore 0 effect loom stoppzi-gro uihooovor 2i drop Wire arrests tho whim-ting movoizsont of the detector through :1 (min of mocha-.o-isn inzu lo ofi'ootivo by the zu'rvsli of tho detector. ,Anothor objooi; of tho invontion, therefore, io to provirio a warp stop moohonisin w erein not only iiiiilii (who Warp'fauit he iorzitod mitoniaticzi-i 1y but tie loom ,shziii he hrough i to rest through move mont of tho detector in 21 (ii-- motion other thou-its rioiooting directional movement.

In tho brozrrhr aspectsof the present invontion, tho'Ciotector-is given a detecting movement and is adapted to be arrested by a drop wire when it fniis io be sii'pporced or its warp thread, and this arrest of the in accordance with lica tion f iovox'm'bw 12:, 1924:. iioria] Ho. i l-53,855.

(ioeotor is utilized in tho present invention to in'iporfiiio the (ioteoior another movement 111- a (hrec 1011 different from its defeating movement, ci'mng'o the position of tho en:-

g 'aged drop Wiro to locate th' varp :fauit. tho present invention, i'no'voment .impfirbeci to ieteoi or when it is orresbod by drop Wire is HiCiiiZBfi to rot throiigi'i a train of shopping n'iochanism to loom stoppag'o so ihabin the present ii-ivoirkion tho d-oceotoi after hoing st ppari by a. drop Wire, is given aruithoi: niovomoni; for tho twofold purpose of first locating the Warp :zzuit-by oi'iangirig the position oi tho drop Wire, avnd second, io ofioct loom sto'prmge.

The above foatures'o'f tho presentinv'oniion and other novel combination of paris will best be irmdo clear from the following description {hid the accompanying drowings of one being; understood that the invention in itii irno Scope wi'ii'bo dofini'teiy sebforth in tho chriins. I

in the drawings: Fig. i is :1 'iorspooiivo training the present invention, certain parts of the loom ii' oohaiiism being omittod-for oiemfnoss of iilusu'zrtion; n

Fig. an enlarge also this ZltiLiii'iODHi Fig. i is a'detaohod detail showing iho stoppingmechanism as. boinp; aotrmcQ-(i to stop we ioom when tho detector is givon iis stopping niovon' oot;

good practical tiorrn thereof, it

croSs-seotionai View 'throogh the mom parts of the War) atop- View of'a, loom con Fig. 5 is -an oninrgod (ioizziii Showing (ho rolaijlon of parts which :rro lazy to bring the ioom to rust romeo our. warp fault; and.

Fig. '3 .is on, onhzrgod perspective View showing certain details in the train Ofil'fl'flimissioii mechanism botweenihe Warp shop motion and the lay actuating devices.

In thedruwings tho loom 11mm 1 may be of usual construction suitable to support the operative ports of the m, and mounted at the front of tho loom is the usual shipper 2 a Whichis hold i i a notch 3 to maintain the ioon in operation. Pivotally mounteii on tho loom. frame and. pretorabiy below the 3 1Q, occur (1 "to the dog or fan-toil 11,- 2. o itself? is pivot-oily supported on the mo loft 12. Pic funtoil 11 has sliding 1% s tot on the snuff. in addition to its i movement, and such sliding moverovide-d by a slot 13, indicated by is. in 3. The shoe 8 is like votully supported by a. slot connection (Fig. with the shaft 12, the construcn being such that should the dog or fanniorcd re uwurdly, it will not no pin 10' to move the slloercere rod 7 and actuate the e loom. to the rock shufit" 12 is the posi- Xi. 15, provided withjun enlarged 3.6 into wl'iicli projects apin 1'? ing from the dog" or fan-tail 11'(l3igs. o and the construction being such that if the positioning arm 15 is raised. it will lift the dog" or fan-tail 11 and gfiosition it in the path of o.- buntcr mounted on the lay 19, so that as the lay moves back, as indicated in Fig. 1, the dog or fan-tail 11 will be struck by the hunter and cause loom stop- The details of the. mechanism just bod may be vuried, but the "form rein shown is .a good practical form this feature.

The rocl-z shat is mounted "for rocking move out in 2:, bearing .20 which may be c-onisuiently supported by a bruc 'et- 21 mounted on the loom frame. The rock shaft 12 is under control of transmission i'iuj-chzniism extending to the warp stop Inotion, such transmission mechanism being so constructed and orrongcd that rocking movement may be imported to the rock shaft to'operatirely position the dog or ion-toil 11, desoribc' whom the detector is O'IVGIL 4 i: its stopping; movement.

the present instruco of the invention, bQc-i t provided for yicldingly uctu ng tho. dog or fun-tail tbrougl'i such incchunism. In the present instance, as inhas secured thereto the sleeve 22 by means of s set screw" 23, and housed within the sleeve 22 is a spring 24%, one cndof which at 25 is socurod to the housing and consequently to the shaft 12?, While the other end 26 thereof is connected to the hub 27 of an arm 28 which is mounted loosely upon the shaft 12.

' 59 Between the housing 24: and the hub 2? are the should-1 portions 29, one on tho housing and, one'on the hub, the construction being ,clr that snould the arm 28 be pulled row inwardly,

b tors ft e spurs has connected thereto the rod 7 1) the hub 27 will be and will act tberetln'ough to yieldingly move the dog or fan cail 11 into operative position, and when the arm 28 is raised; the spring 24 will actv through the shaft 21 to carry the dog 11 out of operative position. The train of mechanism. described is foundto be a. good practical form of transmission mechanism between the win-1 stop mechanism and the dog, but within the present invention this train oi mechanism may be indefinitely varied.

The can 2 is connected by a rod 30 to an arm 31 (Fig. 1) mounted for rocking movement upon a. stud or dead shaft 32, and a; stop finger 33 may be employed above the so arm 81 to limit its upward movement.

- As indicated in the drawings, Fig. 1, the

arm 31 is mounted on. the stud or dead shaft 32 by means of a yoke 34 and has 'a projecting portion or arm 35 which is connected by u rod 36 to a part, presently to be described, for effecting loom stoppage when said port is actuated by the secondary-Inotion of the detector.

Rising from the-loom frame are the supports 3?, one at each end or" the loom, on which the side brackets 38 of the warp stop I mechanism are n1ou.uted. In the present instance, the brackets 38 are provided with the slotted lug through which extends a 05 bolt 40 for securing the brackets 38 in the desired position at opposite sides of the m frame.

Between the brackets 38 are the drop wires ll-of the stop motion, which may be or.- 100 ranged in one or more series, and as shown, may be guided in their movements by means i of the drop wire guides d2 which, in the present instance, pass through slotted openings 43' in the drop wires 41. As shown, each drop wire is provided with an eye 44: tliroughfioach of which passes a. warp threa d u (Fig. 2) whereby the drop wires are normally hold supported by the intact warp threads. As shown-the warp stop m0- t'ion proper is provided with the side bars 45 over wl'iicii the warp threads a puss from the warp bezun. to the shedding incchunisin, and at the lower portion of each of the side bars 45 is preferably (though not nccessuril y) secured u toothed plate 4L6 against which dicu-tcd in Figs, 3 and 6, the rock shaft 12 it drop wire may bear when it cngagcy and arrests movement of the detector. The articular form of the drop wires and t e-E manner of supportby the warp threads 11m F be varied, and any of the usual forms of drop wires may be employed, because the present invention is not circumscribed by 1 this detail, the'only essential in this respect being that when a warp thread becomes broken or too slack for wcavingpurposes that it may move inlo 51' position to arrest the detecting moremcnt of the detector. Mounted in suitable bearings 4'? which muy be conveniently .forincd inia down:-

wrsrdiy extending poriion foil. the brackets 38 at each side of the loomis u detector rock shaft which extends transvorsely of the loom, movement. Secured to the detector rock shaft 4-8 he doibector, which in-iho present instunce comprises a boolhodi burr locomiiocterl to the rock -sl'iu f'ls by means of the flllllfi; 50, ihe huh portions 51 of \vhichare scour the rock shel by: suitable means such who bolls or-thrcuded pins 52, The detector bur "2-9 as shown has teeth 53 at each edge portion thereof, undby this arrangement the detector bur 4-9 may cooperate With 5 two rows or series of drop Wires. l' ixcd. to and movable with the detector roclz lwl'z 48 is :1 lug having u com. surface The lug 54 may be secured. .to the detector shaft in any approved Way, but as shown; such connection is eilccixcd by a. pin 56, ig. 1. i

Loosely mounted lo the detector shaft 4.8 is the cooperating cum member 57 (Fig; 1) having an arm 58 secured to or formed inii'gh, and connected by a rod 59 to on actuator, which may comprisczany oi "the usuul'mcans, now.wclhlcnown, for 1m :1 rocking movement to the arm 58. tor for the arm 53" forms no special he PH out inventionend is there hcreiunil't'cr shown and. described, 'sim-o it well-known. The hub portion of the member 'hea-rs uguins-st the hub porl tion of :1 support or arm which may be conveniently mounted upon one, of the Warp cross-burs 45, as ii'idicuteol 1D.

l'n azrcoiihinro' with the present invention,

he dm'nchir shaft 48 is normally under the in influence of uuwinsl r holding thepurhli? and rum surface on? the hu; in operative engagement, so Shut upon rocking movement of ihc part 57 through its actuator, usdescribnd, the detector shaft will be given its is roching'or detecting movement. In the pres eni; instance of the invention, the detector shn'l' 918 is provided with a spring (Fin. 1.) one end of said spring resiting against the hub )()liili)ll oil the support .60 and. the other end of the spring restingngninsc the hub (r3 of one oi the arms to which the dolor-tor bur 49h; secured." This arrangemrnl'l ufl'ords :1 simple and ronycnient means for nniinlnining: the detector rock shaft 5L8 yieldingly pressed, in one direction and oper oiling to Illillflilllll lheicum. and part .57 in cngugemenl', but within the true scope of the in rention this menus and the dclnils thereof nury be varied. V I

From lho construction ihus far-described it-u'ill be apparent Hurt during n czu'ingwith .norimilly miudifiionewl warp threads, .the drop Wires will be supported out of the path "of movement of the detector-bar, but should the warp thread break or become too slack as shown, and isfcopublc of endivise (3.1, and carries with will be apparent from Fig. 1.-

.t-he following; details of such ncchanismlure latter is moved in rho direction ioi-xvmimnuooscs the "dreviiousl sun t7 7 ported drop \vire will pass into thcf path of ihrough the M11158 of the port 57, however,

continues to operate to rockthc part with the result that the detector shaft 48 is moved cndn'ise in the dircctiono'f the/ arrow (Fig. against the tension of the spring also the detector bur 49, with the result that the engaged. drop. Wire 41, as indiczited'in Fig. 3, is given a diagonal position between the detector bar and the adjacent crossbar 4:5 to thereby indicate the position of the Warp fuulfi, as

As hereinbeiorc indicated, the pr sent, nventlon .itilizes the EDdWiSG movement of thedetector ordetector shaft to effect loom stoppage, and while various forms'of mechanism may be en'iployed for this purpose,-

found to be good practical form o fj fhis feature. Mounted ad acent one endof the detector preferably opposite the end ofthe dc-p motor shaft rocker which portukes o'ihit-s rocking; movement by cindwise. movcinentof the detector shaft. As shown, the rocker comprises u boll crank lever pivoted at 63 (Fig. 4:) on 21 support (34, which. may he lidjnstahly secured. to one of the bars 4-5, (3011- stituting the main poi- 5s of-thc Warp stop motion. The support 6-1, as shown, extends u nvordly ondis provided with a. slot' by which it maybe secured in adjusted. posiiion by a bolt (56 (Fig. 2), the construction being such that, by manipulation of thcjbolt (i6 tho pivotal support of the rocker maybe iniscd or lowered to vory thonmplitudefof movement eilecfed thereby tliroughtheiifai 11 of transn'lission"mechanism to-t he dog'o'r The rocker comprises an 'upstunding por tion 67 Fig. 4) zuhipied to heengulg'cd ,by the end (58 of thedetector shalt -18 when jthc ani'sm, the construction. being such; lluit' 12ov should the detector-sluif'rf w,be movod laugh tudinolly, it will. contact with the np stond,-

ingtmim 67 of the rocker and through the transmission mechanism pla ce'the d j orpj i zuntail 1n"Opel'lllllpOSlilOll l10 bostruck by the hunter 18 on tllcpluygas uran um moves back, to chereliiy stop the loom. I

- The amplitude elf-movement of the rocker will of. course change the amplitude ofmovement of the dog or fan tail and by of its .longi- 115 p through its detecting path without obstruc:

proper adjustment of the pivotal support of 1 the rocker through the means described, the

I the loom with intact or normally condi tioned warp'threads, the detector will move tion." Should a drop wire fail to be supported by its warp thread, it will drop into the path of the detecting movement of the detector and he caught between the serrated edge of the detector and the serrated edge of; the bar 46 (Fig; 3) to thereby arrest the detector. h

rested and the actuator operating through When the detector is thus arthearm 58 continues in action, the cam surface. of the parts 57 and 54 will have rel-- attire-movement to move the detector shaft. 48 longitudinally in the direction of the arrow (Fig 1) against the tension of the spring 61, and the connected detector bar 49 "will move with it, resulting in changing the position of the drop wire 41 (Fig. 3)

so' as. to indicate thepositionof the warp cation, the detectonghaft 48-willact upon the arm 67 of the rocker and effect loom stoppage. v

It may sometimes be desirable to provide the rocker arm 31 with resilient means i to fault, and simultaneously with such indiassist in returning the parts to their nor mal position after the stopping indication, and to this end the arm 31' may have connected thereto, as indicated in Fig. 3, the

spring 71, one end of which may be secured at 72 within the bushing 73 secured to the stud or rock shaft 32/ This, however, may

not always be necessary, because the weight of the parts will naturally" turn 'themto their; inoperative position after the stopping indication of-the loom when the shipper is ajg'ainmoved to its running position." VVhat s claimed-1s: i

. 31. Ina warp stop mechanism for looms,

the-combination? of a series of drop wires normally supported by the warp threads during. weaving, a detector having a detecting movcnient and adapted to be arrested -11] that movement by a drop wire, and means rendered effective by the arrest of the detector. movement to impart to-the detector another movement to indicate the location jot the warp f ult.

2. 1111],: we p stop mechanism for looms. ds the combinatioli of. a series of drop wires,

ddetector having at detecting movement .in

a direction longitudinally; of the warp threads, impartand iyautomat c means for ng another movemefi tothe detector when its detecting t'movenrentfgis arrested by a" drop wir'o/tollocatje the warp fault.

3. In a warp stop mechanism tor-"looms, the combination of a series of drop wires, a detector having adetecting movement and adapted to be arrested in that movement by a drop wire, and means rendered effective by the arrest of the detector movement to impart to. the detector another movement tector'inovement; to impart to 'the detector" another movement to indicate the location of the warp fault, and means actuated by 'said other movement of the detector for stoppingthe loom. I

5. In a warp stop mechanism for looms, the combination of a series ot drop wires normally supported by the warp threads during weaving, adetector having, a detect-- j mg movementadapted to be arrested hy-thc drop Wire, and means rendered operative by arrest of the detector movement to impart movement to the detector in another direction, and'means actuated by movement of the detector in said other direction for effecting loomstoppage. i

6; Ina warp stop mechanism for looms, the combination of a series of drop wires, a detector having a detecting movement and a loom stopping movement, and means rendered effective for imparting the stopping;- movement to the detector by arrest of its detecting movement.

7.- In a warp stop mechanism for looms, the combination of a series of drop wires, a detector having a detecting movement in one direction and a loo-m stopping movement in another direction, and means rendered effective for imparting the loom stopping; movement to the detector by arrest oi. its

' detecting movement.

8. In :a warp stop mechanism for looms, the. combination ofa series of drop wires normally supportcdhy the-warp threads during weir-Vin a' 'lctcctor having); it detects ing, m'ovement ad adapted to l)t',.illl'(l$t0(l in that. movement by a drop wire, and means made operative by arrest of thcdetector movemen'tto impart to the detector a. stopmg movement, and means for-stopping the loom when the detector partakes of its stopplug movement. 4 I

'9. In awarp stop mechanism for looms,

the combination of a ser1es of drop .wires, a detector having a detecting! movement-whichis arrested by a drop wire-when it fails to be supported by a warp thread, means reiv dered e'iiective by arrest of the'dct'ecting.

movement ofithe detector toimpart a Move the combination of a series of drop wires, a

detector, means for imparting detecting movement to the detector, mechanism actuated through said means for anton'iatically imparting a movement of the detector in a. ditl'erent direction when its detecting movement is arrested by a drop wire to change the position of the engaged drop wire and locate the warp t'ault,

11. In a warp stop mechanism for looms. the. combination of a series ot drop wires, a detector comprising a rocl sha ti and toothed bar, means for in'iparting a detecting rocking movementto the rock shalt, and means for autonmtically moving the rock shaft: and

, toothed bar transversely ot' the loom when the rock shat't is arrested in its rocking movement by a drop wire to change the pos1- tion of the drop wire and locate the warp Fault.

1;. In a warp stop mechanism for looms,

the combimltion of a series of drop wires. a detector having detecting movement and a loom stopping movement, means for moving the detector to impart the detecting movement and when that movement is arrested by a drop wire to thereupon impart stopping movement to the detector, and means "for stopping the loom when the detector is given its stopping movement.

13. In a warp stop mechanism for looms, the combination of a detector having, a toothed bar for engaging a drop wire when it tails to be. supported by a warp thread to thereby arrest the detector, and means rendered effective by arrest of the detector movement to automatically move the toothed bar in another direction to change the position of the engageddrop wire to locate the warp 't'ault.

14-. In a warp stop mechanism [or looms, the combination of a series of drop wires, a detector con'iprising a rock shaft and a detector bar scoured thereto, means for imparting at detecting; movement to the rock shaft and detector bar which movement is adapted to be arrested by a drop wire when it fails to be supported by a warp thread,

and mechanism actuated by said means when the detector bar is arrested to impart another movement thereto and change the position of the drop wire to locate the warp fault.

1:"). A warp stop mechanism for looms comprising in combination, a series of drop wires, a rock shaft, a detector bar secured to the rock shaft, means for in'iparting rocking movement to the rock shaftand detector bar intersecting the vertical plane passed through the series of drop wires ,and for atitomatically-imparting movement to the detector bar in a direction substantially parallel to said vertical plane when the detecting movement of the bar is arrested by a drop wire for changing the position of the drop wire to locate the warp fault.

16. A warp stop mechanism for looms, cmnprising, in tmmbination, a series otdrop wires, a rock shaft having a detector bar, means for in'iparting a detecting movement to the detector bar which is adapted to be arrested by 'a drop wire, automatic means for imparting an endwise movement to the rock shaft when the detecting movement of the detector bar is arrested, and stopping means actuated by endwise movement of the rock shaft for e tt'ecting loom stoppage.

17. A warp stop mechanism for looms, comprising, in combination, a series of drop wires, a rock shaft having a detector bar, means for iin mrting a detecting movement to the detector bar which is adapted to be arrested by a drop wire, automatic mean; for imparting an endwise movement to the rock shaft when the detecting movement of the detector bar is arrested, stopping means at:- tuated by endwise movement of the rock shaft for effecting loom stoppage, and means for adjusting the amplitude of movement of the stopping means.

In testimony whereof, I have. signed my name to this specification CARL '1 BROWN. 

